ATLANTA, GA - SEPTEMBER 03: David Ross #8 (L) and Kris Medlen #54 of the Atlanta Braves celebrate after the game against the Colorado Rockies at Turner Field on September 3, 2012 in Atlanta, Georgia. By: Scott Cunningham (Getty Images)

Kris Medlen struck out a career high 12 to lead the Atlanta Braves to a 6-1 win over the Colorado Rockies on Monday.

Medlen (7-1) allowed five hits without a walk in his second complete game of the season.

He extended his streak of scoreless innings to 34 2-3 — the Braves’ longest since Greg Maddux in 2000 — before the Rockies scored an unearned run in the seventh.

The right-hander, who appeared in 38 games in relief before moving into the rotation on July 31, improved to 6-0 with a 0.54 ERA in seven starts. He spent most of 2011 on the disabled list recovering from elbow ligament-replacement surgery on Aug. 18. 2010.

Medlen was 5-0 as a starter in 2010. The Braves have won his last 18 starts. He threw 111 pitches, including 85 strikes.

David Ross hit a two-run double in Atlanta’s four-run third inning.

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